[llvm] [SPIRV] Avoid repeated map lookups (NFC) (PR #128129)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-spir-v

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/128129.diff


1 Files Affected:

- (modified) llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.h (+3-2) 


``````````diff
diff --git a/llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.h b/llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.h
index e6b8a381b7180..c7f846b8e9bcc 100644
--- a/llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.h
+++ b/llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.h
@@ -176,8 +176,9 @@ struct ModuleAnalysisInfo {
     RegisterAliasTable[MF][Reg] = AliasReg;
   }
   Register getRegisterAlias(const MachineFunction *MF, Register Reg) {
-    auto RI = RegisterAliasTable[MF].find(Reg);
-    if (RI == RegisterAliasTable[MF].end()) {
+    auto &RegTable = RegisterAliasTable[MF];
+    auto RI = RegTable.find(Reg);
+    if (RI == RegTable.end()) {
       return Register(0);
     }
     return RI->second;

``````````

</details>


https://github.com/llvm/llvm-project/pull/128129